Jasiński J, Karpierz M. Solution of coupled nonlinear Schrödinger equations in focusing-defocusing medium by modified perturbation theory. Photonics Lett. Pol. [Internet]. 2021 Jun. 30 [cited 2024 Jul. 3];13(2):43-5. Available from: http://photonics.pl/PLP/index.php/letters/article/view/13-15